Winchester, remington, and federal all have them for sale on their respective sites. I think winchester sells 25-100 and 200 for $1/piece, remington (25, 50, 100, 200) is a little cheaper per patch but they only sell them in lots of 5 or 25 I believe, and federal has/had them for 0.50/patch (25, 50, 75, 100).

Winchester, remington, and federal all have them for sale on their respective sites. I think winchester sells 25-100 and 200 for $1/piece, remington (25, 50, 100, 200) is a little cheaper per patch but they only sell them in lots of 5 or 25 I believe, and federal has/had them for 0.50/patch (25, 50, 75, 100).